MRWPCA Proposed Groundwater Recharge Project

1. MRWPCAProposed Groundwater Recharge Project By Keith Israel, General Manager Monterey Regional Water Pollution Control Agency and Bill Mills (Consultant) March 21, 2005

2. Overview of Presentation Topics • General MRWPCA Background • Recycled Water Availability • Orange County Groundwater Recharge Experience • Possible MRWPCA Project • Questions

3. LEGEND MOSS Service Area LANDING CASTROVILLE MARINA MARINA SAND PACIFIC CITY BORONDA GROVE SEASIDE SALINAS FORT MONTEREY ORD MILITARY RESERVATION DEL REY OAKS

4. Recycled Water Production 13,500 10,000 AF/YR

5. Recycled Purified Water for Groundwater Recharge in Orange County

6. Presentation Overview • Need for New Supplies • A History of Wastewater Recycling in OC • Why the Groundwater Replenishment System • Coping with Public Perception • Permitting Concerns of Health Services • Project Costs

7. Future Water Shortages are Predicted • Reliability of imported water challenged by legal and environmental issues • Large population increases in the future • By 2020 — Southern California: 7 million - California: 15 million • CA Department of Water Resources predicts shortages by 2020

8. Waste Water Recycling - a Visionary Concept in OC Water Factory 21 – 1975 Irrigation Project – 1990 Waste Water Discharge to the Ocean was Viewed as a Reliable Water Source since the 1960s

9. Water Factory 21 was conceived as a sea water intrusion control project • Initiated Operations in 1975 • First Advanced Indirect Potable Supply Project in the World

10. Water Factory 21: A 15 mgd advanced waste water reclamation facility, supplied fresh water for sea water barrier Since 1975 produced over 100,000 ac-ft of water that blends with existing groundwater Over 25 years of operating experience Injected water is withdrawn by municipal wells as drinking water Injected water meets all drinking water standards 1/3 of product water treated by Reverse Osmosis

11. In 1995, WF 21 was near the end of its useful life and technological advances could substantially reduce cost

12. The Groundwater Replenishment System (GWRS) was conceived to provide a new, reliable water supply Concept: Secondary Treated discharge to the Ocean would be treated to Drinking Water Standards and recharged into the OC Groundwater Basin

13. GWRS must incorporate all technological advances in treatment technology since 1975 Seawater intrusion control and recharge along the coast, and Recharge in the interior of the basin Treat all water to Drinking Water Standards

14. GWRS treatment technologies will incorporate technology advances since WF 21 and treats all water with Reverse Osmosis

15. Research behind the Project • Microfiltration as a Replacement for the High Lime Process • Underground Retention and Travel Times • Membrane Advancements • Contaminants of Concern

16. Water + contaminants under pressure S • S S S S S S S S S S S S Porous hollow fiber MF membrane Purified Water Microfiltration

17. Reverse Osmosis Technological Advances

18. RO Membrane Is Like a Microscopic Strainer That Allows Water Molecules to Pass Through Water Molecules Protozoa Bacteria Virus Inorganics Organics

19. Ultraviolet light has been proven to be safe & reliable for disinfection of water. Most effective when preceded by hydrogen peroxide UV light disinfects water inactivating microbial pathogens through destruction of genetic material

20. Ultraviolet (UV) Doubles as Disinfectant and Destroyer of Contaminants of Concern • NDMA • 1,4 Dioxane with peroxide addition • Xenobiotics? • Synthetic Organic Compounds

21. Ultraviolet +Peroxide Microfiltration (MF) Reverse Osmosis (RO) OCSD Secondary Effluent Purified Water Backwash OCSD Plant 1 Brine OCSD Outfall GWR System Advanced Water Treatment Flow Diagram

22. Water Factory 21 flocculation carbon adsorption influent filtration blending clarification reverse osmosis recarbonation lime sludge CO2 recycled lime recalcining transfer thickening recycled lime

23. Public perception can stop or shut-down the Recycling ProjectToilet to Tap !! • San Gabriel River Groundwater Recharge Project • San Diego Repurification Project • Dublin/San Ramon (Clean Water Revival) Project • LA’s East Valley Project

24. Perception can be managed • Determine Public View of Recycling -Research thru Focus Groups and Surveys • Develop a Communication Program -Target potential opposition groups • Invest in a well funded Public Relations Program … an insurance program Public acceptance comes with understanding the need for recycling and the effectiveness of the treatment technology

25. State Department of Health Services Approval Status • Received updated concept approval letter in August 2002 and Permit in 2004 • Grants concept approval for a 75% recycled water project (25% dilution water) • Specifies a 2 year - phased approach to 100% recycled water (no dilution water)

26. All Construction Contracts have been awarded, project is scheduled to begin operations in 2007

27. Estimated Capital Cost *3 contracts

28. Estimated Annual O&M Cost

29. Federal, State, and Local Funding

30. Unit Cost in $/AF of Water from GWRS Capital O&M Total With out subsidies: 40 385 425 With subsidies

31. Keys to successful implementation of a recycled water project are: Developing a researched based public outreach program that continues throughout the implementation process Treating the water to drinking water quality Establishing a need for additional water

32. Thank You. END OF PRESENTATION

33. What Would a MRWPCA Project Look Like? • Treatment Facilities • Distribution Pipeline • Recharge Area

35. Recharge with Recycled Water is highly regulated and will require an advanced level of treatment, similar to Water Factory 21 in Orange County

36. Water Purification Plant • Treatment Tertiary Effluent • Treatment would include: • Micro Filtration (if needed) • Reverse Osmosis • Ultraviolet Disinfection • Likely Located at RTP • Brine Discharged to Outfall

37. Distribution System • New Pump Station and Pipeline • Alignment through Fort Ord along General Jim Moore Road • Pipeline could be dual purpose and carry recycled water during irrigation season

38. Recharge • Percolate through soil for extra treatment and recharge of aquifer • Several good locations at Fort Ord

39. Surface Recharge Basin in an Urban Area

41. Preliminary Estimates of Project Timing, Sizing, and Cost • Operate in winter months • Up to 4,000 AFY • Cost could be in the $1,000 - $1,100/AF range • Project compatible with Joint Urban Recycled Water Project with MCWD

42. Keys to successful implementation of a recycled groundwater project are: Establish need Utilize public outreach Meet all Local/State/Federal groundwater recharge standards

43. Next Steps • Construct monitoring wells near recharge area • Determine best pilot recharge location • Collaborate with other Agencies on Recharge • Submit Prop 50 grant application • Schedule future visit to Orange County for others

45. Changing Wastewater Into Safe Water